Code p0304

[gandprixgtpsuper]

Some jerk in a charger tried to race me and after i whiped his ass i went home and grabed a beer and when i started the car back up the check engine light popped on. I took it to auto zone and this code popped up p0304...i know little about cars so please help me out here.

 

[a3gtp]

P0304: Cylinder 4 Misfire

Check your plug wire for damage and make sure it's on there snug and remove the plug on that cylinder and see what kind of condition it's in, at least this is a starting point. Cylinder 4 is the middle one on the back bank of cylinders (the bank next to the firewall)
Let me know how it goes.

 

[blueguy]

Heh...sorry to be a negative nancy but I just lost cylinder #4

If the electrode on the plug is bent at all then there is internal damage...I would try to change the plugs/wires out for new ones...what are your mods? JW so I can recommend the right plug for ya...

 

[TDCRacing]

Also check the ceramic on the glug. That can also be cracked and cause this.

 

[gandprixgtpsuper]

ok so i went and put some fuel injector cleaner in there drove it around for about 10 min, i messed with one of the spark plug wires that i thought may be a little weak. After i did that i started the car up and about 10 secs later the light went off. Im thinking mabe a bad wire or 2 so im gonna get a tune up this week end and see if that helps but so far so good.

 

[kcfalcon2000]

I guess I got My BT interface / Torque reader just in time. Check engine light with the p0304 #4 misfire. After resetting will only come up if I accelerate hard / load up motor. Engine will "bump" "hesitate" what every you want to call, it a bit loading up ...on an incline trying to maintain speed or accelerate. If I down shift and get the RMPs up it smooths out. MPGs no change and normal on start, idle, and easy driving. 170k and R&R LIM, UIM, TB gaskets, plugs, coolant, oil 1200miles ago. Did a 0-60 check about 300 miles ago and was 6.7s. No mods. engine clean. 190 tstat and OBD says 199-210f with ac and 90f temp. Vac lines being shipped. SO I guess Injectors or ECM? I disconnected battery over night no change. almost forgot. MAF sensor changed 10 mo ago.